Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Add pacemaker for HA snapshot deployments

    Change-Id: Ic7b631af3968de8868177efa719f7c6e01628ce9
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index a473a19..48d1c68 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit a473a19aca3837eeb77adc41523bb1db95b5f47d
+Subproject commit 48d1c6885afe72c92d07204cdfc97829ce9d24ed